Can't import available assets. (empty asset list)

Hi there,

I just installed Unity (Unity Pro) and created a project. Now I wanted to import assets from list like "Eviroment" and "Vehicle" etc. But the list is empty. Only the entry "Custom Package..." is there.
On Unity Launcher (new project) a can select available assets. What's wrong?

At home all (standard) assets are available. (Personal Edition).
I see 2D, Vehicle, Enviroment, etc. But here in the Pro Edition the list is empty.

Also if I download assets from Asset Store, the assets are only available in Unity Launcher. But not in Unity Editor File > Assets > Import Package. Weird...

see screenshots.

 

https://answers.unity.com/questions/1554644/missing-all-standard-assets.html